/* $Id$ */
/** @file
* IPRT - Multiprocessor Event Notifications, Ring-0 Driver, Solaris.
*/
/*
* Copyright (C) 2008-2015 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "the-solaris-kernel.h"
#include "r0drv/mp-r0drv.h"
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** Whether CPUs are being watched or not. */
static volatile bool g_fSolCpuWatch = false;
/** Set of online cpus that is maintained by the MP callback.
* This avoids locking issues querying the set from the kernel as well as
* eliminating any uncertainty regarding the online status during the
* callback. */
/**
* Internal solaris representation for watching CPUs.
*/
typedef struct RTMPSOLWATCHCPUS
{
/** Function pointer to Mp worker. */
/** Argument to pass to the Mp worker. */
void *pvArg;
/**
* Solaris callback function for Mp event notification.
*
* @returns Solaris error code.
* @param iCpu Which CPU is this event for.
* @param pvArg Ignored.
*
* @remarks This function assumes index == RTCPUID.
* with preemption enabled.
*/
{
/*
* Update our CPU set structures first regardless of whether we've been
* scheduled on the right CPU or not, this is just atomic accounting.
*/
{
}
{
}
else
return 0;
return 0;
}
{
if (ASMAtomicReadBool(&g_fSolCpuWatch) == true)
return VERR_WRONG_ORDER;
/*
* Register the callback building the online cpu set as we do so.
*/
for (int i = 0; i < (int)RTMpGetCount(); ++i)
if (cpu_is_online(cpu[i]))
ASMAtomicWriteBool(&g_fSolCpuWatch, true);
return VINF_SUCCESS;
}
{
if (ASMAtomicReadBool(&g_fSolCpuWatch) == true)
{
ASMAtomicWriteBool(&g_fSolCpuWatch, false);
}
}